#include <stdio.h>

float celsius(float fahr);
/*print Fahrenheit-Celsius table for fahr = 0,20,```,300; floating-point version */
main()
{
	float fahr;
	int lower, upper, step;
	lower = 0;
	upper = 300;
	step = 20;
	
	fahr = lower;
	while(fahr <= upper){
		printf("%3.0f %6.1f\n", fahr, celsius(fahr));
		fahr = fahr + step;
	}
}

/* celsius: convert fahr into celsius */
float celsius(float fahr)
{
	return (5.0/9.0)*(fahr-32.0);
}
